參數(shù)資料
型號(hào)： LTC1090CS
廠商： LINEAR TECHNOLOGY CORP
元件分類： ADC
英文描述： Single Chip 10-Bit Data Acquisition System
中文描述： 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, PDSO20
封裝： PLASTIC, SOL-20
文件頁(yè)數(shù)： 17/28頁(yè)
文件大?。?/td> 344K
代理商： LTC1090CS
17
LTC1090
1090fc
Parallel Port Microprocessors
When interfacing the LTC1090 to an MPU which has a
parallel port, the serial signals are created on the port with
software. Three MPU port lines are programmed to create
the CS, SCLK and D
IN
signals for the LTC1090. A fourth
port line reads the D
OUT
line. An example is made of the
Intel 8051/8052/80C252 family.
Intel 8051
To interface to the 8051, the LTC1090 is programmed for
MSB first format and 10-bit word length. The 8051 gener-
ates CS, SCLK and D
IN
on three port lines and reads D
OUT
on the fourth.
Hardware and Software Interface to Intel 8051 Processor
8051 Code
MNEMONIC
MOV PI,#02H
DESCRIPTION
Initialize port 1 (bit 1 is made
an input)
SCLK goes low
CS goes high
D
IN
word for the LTC1090 is
placed in ACC.
CS goes low
Load counter
Delay for deglitcher
Read data bit into carry
Rotate data bit into ACC
Output D
IN
bit to LTC1090
SCLK goes high
SCLK goes low
Next bit
Store MSBs in R2
Read data bit into carry
CIear ACC
Rotate data bit into ACC
SCLK goes high
SCLK goes low
Read data bit into carry
Rotate right into ACC
Rotate right into ACC
Store LSBs in R3
SCLK goes high
SCLK goes low
CS goes high
Load counter
Delay for LTC1090 to perform
conversion
Repeat program
CLR P1.3
SETB P1.4
CONTINUE: MOV A,#0DH
CLR P1.4
MOV R4,#08
NOP
MOV C, P1.1
RLC A
MOV P1.2, C
SETB P1.3
CLR P1.3
DJNZ R4, LOOP
MOV R2, A
MOV C, P1.1
CLR A
RLC A
SETB P1.3
CLR P1.3
MOV C, P1.1
RRC A
RRC A
MOV R3, A
SETB P1.3
CLR P1.3
SETB P1.4
MOV R5,#07H
DJNZ R5, DELAY
LOOP:
DELAY:
AJMP CONTINUE
APPLICATIOU
W
U
U
Figure 5. Several LTC1090’s Sharing One 3-Wire Serial Interface
LTC1090
ANALOG
INPUTS
D
OUT
D
OUT
from LTC1090 stored in 8051 RAM
D
IN
SCLK
ACLK
CS
P1.1
P1.2
P1.3
ALE
P1.4
8051
B9
R2
R3
*B9 is MSB in unipolar or sign bit in bipolar
MSB*
LSB
B8 B7 B6 B5 B4 B3 B2
B1 B0
0
0
0
0
0
0
LTC1090 AI14
LTC1090
3
3
2 1 0
OUTPUT PORT
SERIAL DATA
CS
8 CHANNELS
3-WIRE SERIAL
INTERFACE TO OTHER
PERIPHERALS OR LTC1090s
MPU
LTC1090
3
CS
8 CHANNELS
LTC1090
3
CS
8 CHANNELS
相關(guān)PDF資料
PDF描述
LTC1090CSW Single Chip 10-Bit Data Acquisition System
LTC1090M Single Chip 10-Bit Data Acquisition System
LTC1090MJ Single Chip 10-Bit Data Acquisition System
LTC1091AC 1-, 2-, 6- and 8-Channel, 10-Bit Serial I/O Data Acquisition Systems
LTC1091ACN8 1-, 2-, 6- and 8-Channel, 10-Bit Serial I/O Data Acquisition Systems
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1090CSW 功能描述:IC DATA ACQUIS SYS 10BIT 20-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤(pán)
LTC1090CSW#PBF 功能描述:IC DATA ACQUIS SYS 10BIT 20-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤(pán)
LTC1090CSW#TR 功能描述:IC DATA ACQ SYSTEM 10BIT 20SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤(pán)
LTC1090CSW#TRPBF 功能描述:IC DATA ACQUIS SYS 10BIT 20-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤(pán)
LTC1090M 制造商:LINER 制造商全稱:Linear Technology 功能描述:Single Chip 10-Bit Data Acquisition System
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